Tree Networking - Huawei Airbridge BTS3612A-1900 Technical Manual

Technical Manual
Airbridge BTS3612A CDMA Base Station
To configure a BTS trunk link, the forward/reverse BCIM No., forward/reverse link set
No., and forward/reverse VP No. should be properly configured.

8.5.3 Tree Networking

I. Application scope
Tree networking mode applies to the area where network structure, site and
subscriber distribution are complicated, such as the area where different types of
subscribers are not evenly distributed.
Tree networking is shown in Figure 8-5.
BSC
Figure 8-5 BTS tree networking
II. Advantage
In the tree networking mode, less transmission lines are needed than in the star
networking mode.
III. Disavantage
In this mode, because signals go through many sections of links, the line reliability is
low, and engineering and maintenance are difficult.
The failure of upper-level BTS may affect the normal operation of lower-level BTS.
Expansion is not easy and may cause substantial network reconstruction.
The cascaded BTSs should not exceed 3 levels, i.e. the depth of the tree should not
exceed 3 layers.
IV. Implementation
The tree networking is in fact one application of the chain networking. For example,
the first-level BTS can be configured with multiple trunk links. These trunk links can
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System Principle
Chapter 8 BTS Configuration